Canon 550 EX - Manual (Page 116)

116
Troubleshooting Guide
Problem
I cannot detach the Speedlite
from the camera.
The flash does not fire even
when I press the shutter
button completely.
After I turn on the Speedlite,
the pilot lamp turns off after a
while.
When I turn on the main
switch, the entire display
blinks.
When I press the shutter
button halfway, the flash
range bar segments blink.
I installed new batteries in the
external power source, but
the flash still does not fire.
I installed new batteries in my
external power source and
connected it to the Speedlite.
When I turned on the power
switch, the flash head
zoomed automatically. Or the
LCD panel display went out.
The flash picture looks dark
toward the bottom.
No.
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Probable Cause
The locking collar has not
been loosened enough to
retract the locking pin.
The Speedlite has not been
mounted properly on the hot
shoe.
The hot shoe contacts are
dirty or the Speedlite’s
mounting foot contacts are
dirty.
With the main switch set to
SE, the Speedlite turns off
automatically when it is not
used for 90 sec.
The wide panel is not fully
retracted.
The wide panel has been
extended and the Speedlite is
set for bounce flash.
The flash head has been
tilted downward by 7°.
Batteries have not been
installed in the 550EX itself.
Or, the batteries in the 550EX
are exhausted.
The batteries in the 550EX
are exhausted. Disconnect
the external power source
and turn on the 550EX. If the
pilot lamp does not light
within 30 sec., the 550EX’s
batteries are exhausted.
The subject was too close to
the camera.
Solution
Loosen the locking collar
completely to retract the
locking pin.
Mount the Speedlite properly
and securely on the camera.
If the contacts are dirty, use a
clean cloth to wipe them.
Press the shutter button
halfway or press the test
firing button.
Retract the wide panel
completely.
Retract the wide panel.
Except for close-distance
subjects, do not tilt the flash
head downward.
Even when using an external
power source, be sure to
have good batteries in the
550EX.
Replace the batteries in the
550EX with new ones.
If the subject is 2 meters or
closer, tilt the flash head
downward by 7°.
08. F073-E (99~) 02.4.1 2:16 PM Page 116